Su (kana)
| su | |||
|---|---|---|---|
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| Transliteration | su | ||
| Translit. with dakuten | zu | ||
| Hiragana origin | 寸 | ||
| Katakana origin | 須 | ||
| Man'yōgana | 寸 須 周 酒 州 洲 珠 数 酢 栖 渚 | ||
| Voiced man'yōgana | 受 授 殊 儒 | ||
| Spelling kana | すずめのス (Suzume no "su")  | ||
| kana gojūon | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Kana modifiers and marks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Multi-moraic kana | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
す, in hiragana or ス in katakana, is one of the Japanese kana, each of which represents one mora. Their shapes come from the kanji 寸 and 須, respectively. Both kana represent the sound [sɯ]. In the Ainu language, the katakana ス can be written as small ㇲ to represent a final s and is used to emphasize the pronunciation of [s] rather than the normal [ɕ] (represented in Ainu as ㇱ).
| Forms | Rōmaji | Hiragana | Katakana | 
|---|---|---|---|
| Normal s- (さ行 sa-gyō)  | 
su | す | ス | 
| suu, swu sū  | 
すう, すぅ すー  | 
スウ, スゥ スー  | |
| Addition dakuten z- (ざ行 za-gyō)  | 
zu | ず | ズ | 
| zuu, zwu zū  | 
ずう, ずぅ ずー  | 
ズウ, ズゥ ズー  | 
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* スィ and ズィ are also used to present si and zi pronunciations respectively. For example, 'C' is presented as スィー /siː/. See also Hepburn romanization.